Results 21 to 30 of about 16,652 (173)

Metabolomic Study on the Advanced Pancreatic Cancer Model in Nude Mouse [PDF]

open access: yes, 2016
胰腺癌是一种恶性程度极高的消化道类恶性肿瘤,早期无显著病征,病人在确诊时病情基本已处于中晚期,而研究显示,直径小于2cm和1cm的胰腺癌术后5年生存率分别可达30%-60%和超过75%,远高于中晚期术后5年生存率。 本文为课题“基于核磁共振的代谢组学技术发现胰腺癌的生物标志物及早期诊断应用”的一部分。整个课题目的在于通过系统分析动物和人类胰腺癌中晚期模型代谢通道的异同点,然后通过构建动物早期胰腺癌模型,并结合中晚期动物与人类胰腺癌代谢通路的共同点 ...
李志水
core  

Representation of obligate groundwater‐dwelling copepod diversity in European protected areas

open access: yesConservation Biology, EarlyView.
Abstract Groundwaters sustain diverse surface ecosystems and are populated by metazoan species, mostly invertebrates, that provide fundamental ecological functions and are often of prominent conservation value due to narrow endemism and high phylogenetic rarity.
Francesco Cerasoli   +7 more
wiley   +1 more source

MRI study of the effect of Sialic acid supplementation on piglets working memory [PDF]

open access: yes, 2015
唾液酸(Sialicacid,Sia)是自然界中一系列酰基化形式神经氨酸衍生物的统称。唾液酸具有多种生物学功能,如:促进细胞的增殖、分化和参与识别;与病原微生物相互作用,参与机体免疫反应;促进神经系统发育,易化记忆形成,提高学习能力;且在大脑发育的关键时期,进行干预可以对大脑造成远期的不可逆的影响。许多动物实验表明唾液酸对大脑发育、学习和记忆能力产生重要影响,仔猪因大脑发育阶段和解剖结构与新生婴儿相似,适合用做研究婴儿脑区变化的动物模型。磁共振成像技术因其对软组织空间分辨率高 ...
吕春龙
core  

Synthesizing beaver coexistence messaging with the capability, opportunity, and motivation behavior model

open access: yesConservation Biology, EarlyView.
Abstract In the western United States, conservation practitioners are increasingly working with private landowners to restore habitat for North American beavers (Castor canadensis) and to use nonlethal mitigation techniques when beavers damage crops and infrastructure.
Brian D. Erickson, Megan S. Jones
wiley   +1 more source

人体增生性疤痕移植于裸鼠动物模型的建立及稳定性观察

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 1999
目的: 将增生性疤痕组织块以不同的方法移植于裸鼠, 建立一稳定的疤痕动物模型, 为研究增生性疤痕提供实 验基础。方法: 将 3 mm×3 mm 增生性疤痕组织块分别移植于裸鼠皮下和体表创面, 定期进行大体观察, 组织学观察及胶原定 量测定。结果: 增生性疤痕组织块移植于裸鼠皮下后, 移植物可成活 80~ 90 d,无排斥反应, 并保留原增生性疤痕特性; 移植物 体积随着移植时间而逐渐增加。结论: 增生性疤痕组织块移植于裸鼠皮下建立的增生性疤痕动物模型是一成功、稳定的动物 模型 ...
朱家源 朱 斌 苏爱云 朱全胜 郭浩光 赖英荣 唐 庆
doaj  

The effection of regulate AQP-4 on hydrocephalus in rats [PDF]

open access: yes, 2015
目的:研究调控AQP-4蛋白对大鼠脑积水发生发展的治疗作用。 方法:雄性成年(周龄约8-9周)SD大鼠(250±20g),随机分成4组,脑积水组20只,生理盐水组(假手术组)20只,阴性干预组(予以腹腔注射黄体酮)20只,阳性干预组(予以腹腔注射睾酮)20只。脑积水模型建立方法为:腹腔注射水合氯醛麻醉SD大鼠后,固定于脑立体定位仪上,以微量注射泵调节微量进样器向大鼠脑室内注射30μl的3%高岭土混悬液,使之产生脑积水。生理盐水组的大鼠脑室内注射为生理盐水,其余的脑积水组、阴性干预组 ...
吴剑
core  

Functional homogenization of terrestrial mammals outside protected areas in the Hengduan Mountains, China

open access: yesConservation Biology, EarlyView.
Abstract Despite the crucial role of human impacts on biodiversity loss, many assessments of this loss focus on single metrics, such as species richness, and overlook the multidimensional effects of human activities. Because of its importance to ecosystem functioning, we investigated the functional diversity of medium‐ and large‐sized mammal ...
Xueyou Li   +8 more
wiley   +1 more source

再生障碍性贫血小鼠模型的免疫学评价

open access: yesZhongguo shiyan zhenduanxue, 2011
目的对再生障碍贫血(aplastic anemia,AA)实验动物模型的免疫学相关指标进行检测和评估,为动物模型提供更全面的评估指标。方法建模BALB/C小鼠经γ射线照射后尾静脉注射DBA小鼠脾脏细胞,无菌饲养15日检测与再生障碍性贫血症相关的血常规和免疫学指标。结果 (1)模型组小鼠相比正常对照组,外周血常规指标指标与AA患者临床表现基本相符;(2)模型组小鼠外周血免疫学指标变化与临床AA患者基本相符。结论我们成功构建AA动物模型 ...
张恒   +8 more
doaj  

The role of MiR-23b-3p in the epileptogenesis [PDF]

open access: yes, 2016
癫痫是指脑部持续存在能导致癫痫反复发作,并出现相应的神经生物学、认知、心理学,以及社会学等方面的后果的脑部疾患。目前miRNA在癫痫发生发展中的作用引起越来越多的重视。miR-23b-3p是具有多种生物学作用的miRNA,如调节神经元增殖、分化和凋亡等,参与多种神经退行性疾病的病理机制。 本研究通过腹腔注射海人酸(Kainicacid,KA)构建小鼠癫痫模型,发作达到Racine标准的4-5级作为实验组纳入标准,对照组注射相同剂量的生理盐水,并应用荧光定量PCR法对皮层和海马组织中miR-23b-3p ...
战连波
core  

Effects of landscape context on avian specialist response to increased surface temperature in protected areas

open access: yesConservation Biology, EarlyView.
Abstract Human development is a driver of global change and a major threat to biodiversity. Protected areas maintain and support biodiversity, but outside stressors, such as climate change and land use change, can negatively influence natural resources within protected areas.
Leah J. Rudge   +2 more
wiley   +1 more source

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